Surprised by the size of these. I always use 8mm dice for Arkham Horror, as there's generally so much stuff scattered about the table, not to mention to many dice required at times (I think my record roll was 14), that there's just no room to be rolling standard-sized D6s without leaving a swath of destruction across the board!
That said, they do look nice. Just can't see using them effectively in a game of Arkham Horror.